#14208: Performance with -O2 is worse than with -O0 which is worse than runghc -------------------------------------+------------------------------------- Reporter: harendra | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): I can reproduce this. Thanks for the excellent test case. You can also build everything with `cabal new-build benchmarks`. Adding an `{- INLINABLE toList -}` improves the situation a lot but it is still slower than with -O0. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14208#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler